Just updated my Firefox to v. 3.6.3 and my attention was brought to 'Personas' that are available (as far as I can tell, this just means a decoration for your toolbar, or whatever it is called, at the top of the screen).
Naturally, took a gander for a Fulham persona:
https://addons.mozilla.org/en-US/firefox/search?q=fulham&cat=personas
I've been using one for about a fortnight now; badge on the right and Cottage on the left. You have to trawl through dozens of pages, even the sports section, as there doesn't seem to be a quick search.